Edge-setting machine



1940- E. TOPHAM EDGE-SETTING MACHINE 5 Sheets-Sheet 1 Filed Feb. 28, 1938 N am Feb. 20, 1940.

| E, TOPHAM EDGE-SETTING MACHINE Filed Feb. 28, 1938 5 Sheets-Sheet 2 QIQ i N 3 m ML 8 Feb. 20, 1940. L. E. TOPHAM V EDGE-SETTING MACHINE Filed Feb. 28, 1938 5 SheetsSheet 3 //V vE v TUQ W w M M;

1940 L. E. TOPHAM EDGE-SETTING MACHINE 5 Sheefs-Sheet 4 Filed Feb. 28, l9 38 Feb. 20, 1940. 1.. E. TOPHAM EDGE-SETTING MACHINE Filed Feb. 28, 1938 5 Sheets-Sheet 5 Patented Feb. 20, 1940 to United Shoe Machinery Corporation, Borough of Flemington, N. J a corporation of New Jersey Application February 28, 1938, Serial No. 193,036

I r 19 Claims. (Cl. 12-78) This invention relatesto machines for operating upon shoes and is illustrated as embodied in a machine for burnishingor setting theedges of soles. f i

In edge-settingmachihes, for example," the operating mechanism forthe edgeesetting tools sets up vibrations of considerable amplitude, and the transmission of these vibrations from the operating mechanism to the machine frame is the cause of much noise as well as destructive object of this invention to reduce the amplitude of the vibrations'transmitted from the operating mechanism to themachi ne frame? In the illustrated machine, this result is obtained by the use of resilient connecting means located between the machine frame and the operating mechanism for the edge-setting tools, which is arranged to hold the operating mechanism spaced from the machine frame, and at, the same time to absorb a partof the vibrationsgiven off by the operating mechanism. Yieldingly sup-porting the operating mechanism in spaced relation to the machine frame is especially advantageous to absorbing vibrationsrthe yielding support permits the operating mechanism together with the attached edge-setting tools to move relatively to the machine frame, thus facilitating the edgesetting operations upon sharply curvedv portions of the shoe soles such as the toe portions.

Edge-setting machines heretofore available operate at relatively low speeds ranging from approximately 3450 to 3500 oscillations of the tool 3 shaft a minute, and, while generally satisfactory when operated at these speeds, the machines have a tendency to produce streaks of different brilliancy on the sole edge operated upon and the operator has difliculty in setting the abruptly 40 curved portions of the sole edge. While these machines are mechanically capable of-operating at higher speeds, such high speed operation is not practicable clue to the excessive amount of vibration and noise which occurs at the higher 45 speeds. The excessive vibration is due to a number of difierent causes, a very prominent one of which is the intense vibration of the operating mechanism beyond low critical speeds. With this in view, it isanother important objector this invention to provide an improved edge-setting machine capable of operatingsmoothly and quietly at operating speeds in the neighborhood of 6000 oscillations a minute and as an aid in the accomplishment of this object, toprovide an operating mechanism which is not subject to a wear upon the machine. Accordingly, it is an.

in edge-setting machines because, ,in addition low criticalspeed. To this end a feature of the present invention resides in an improved operating mechanism embodying a rotatable operating member which, as illustrated herein, is so constructed and arranged that the stresses set upin the member when rotated tend to bend it opposite directions with a resulting balancing effect whereas if these stresses tended to bend different portions of the member in the same direction there would be an unbalancing' effect. Preferably, and as illustrated herein,the rotatable member consists of a rotary shaft with parallel crank members extending from the ends thereof, the arrangement being such that when the shaft is rotated, deflection of the crank members, due to the resiliency of the material out; of which they are constructed, will tend to bendthe shaft into a shape resembling a relatively flat sine curve, thus maintaining the center of gravity of the rotating shaft substantially constant, thereby avoiding low critical speeds and the attendant violent vibrations.

In theedge-settingmachine illustrated herein,

headwhich may be turned to bring one or the other edge-setting tools into operative position is retained within the: tool shaft by a connecting me which is rotatably mounted within the shaft, the inner endof the pin being located adjacent to the connection between the tool shaft and the operating crank. The connection between the pin and spindle is made by means of a cap attached to one end of the pin and a spring interposed between the cap and spindle, the cap being attached to the spindle by a sliding andturning ,the hollow shank or spindle in the tool-carrying movement. According to another feature of this invention, provision is made for preventing the connecting pin from rotating while the cap is being attached to the end of the pin to hold the turret assembly in place. To this end, means are provided within the casing andadjacent to the inner end of the pin which are arranged for holding engagement with the pin when the cap is being placed on or taken off of the pin.

Invention is also to be recognized in the prorangement of the lubricating systemwhich makes it possible for the lubricating system to apply a lubricant to the connections between the opervision of relatively heavy casings for the operating mechanism and the tool shafts which Fig. 3 is an elevation of the right end of the machine shown in Fig. 1, with the end of the housingand cover plate broken away;

Fig, 4 is a sectional view taken along line IV-IV of Fig. 1 but on a larger scale and with the housing omitted for purposesof clarity;

Fig. 5 is an exploded perspective view of a portion'of the pin and cap assembly which holds the tool; head shank in the tool shaft; and

Fig. 6 is a schematic representation of the crank mechanism for operating the stool shafts asviewed from the side. i

The illustrated machine comprises a frame which consists of a standard l0 supporting a head which comprises a pair of housings l2, 14 which enclose the actuating mechanism of the machine. Removable cover plates l6, l8 (Fig. 2) and support plates 28, 22 (Fig. 1) complete the closure of the housings. The actuating mechanism of the machine comprises a rotary drive shaft 24' (Fig. 1) from the ends of which extend crank members 26, 28, which are parallel to each other and extend at anangle to the axis of the driving shaft. Attached to the driving shaft 24 isa pulley 38 which is operated by a belt 32. The crank'members 26, 28 are connected to parallel tool shafts 34, 36, in a manner which will hereinafter be described, the connection between these cranks and tool shafts constituting the sole supporting means for the driveshaft 24 and the cranks.

Enclosing the tool shafts and cranks are heavy casings 38, 40 which form the bearings for the tool shafts and which, due to their mass, absorb a considerable amount of the reaction of the operating mechanism. These casings are main tained in spaced relation to the sides of the hous 'ings l2, l4 by means of springs later to be described which allow the casings together with the mechanism enclosed therein to move relatively to the walls of the housings, and at the same time absorb a portion of the vibrations set up by the operating mechanism located within the casings and thus further reduce the amplitude of the vibrations which are transmitted to the supporting portions of the housings. The structural arrangement of the machine parts is the same in both housings, consequently it will suffice to describe in detail one set of machine parts, such for example, as would be located in the right'housing as viewed in Fig. 1. Similar parts hereinafter described will be given like numerals in both housings.

The vertical support for the casing 38 is provided by three relatively heavy springs 42, 44, 46 which are seated upon lugs formed on the base of housing I4 (Fig. 2) and which extend upwardly through openings in the casing and into engagement with recesses in a casing head 16 (Fig. 4). The rear portion of thecasing is spaced from theadjacent wall of the housing by four springs parts of 48, 50, 52, 54 (Fig. 2) which converge inwardly from recesses formed in the adjacent wall of the housing and into seating engagement with inclined spring seats formed in the rear wall of the casing 38 (Figs. 1 and 2). The front of the casing provides the bearing for the tool shaft 34 and is formed with aprojecting portion 39 which extends. outwardly through an opening in the supporting plate 20 (Fig. 1). This projecting por tion of the casing is spaced from the walls of the opening in the supporting plate 20 by a pair .of

vertically arranged springs 56, 58 (Figs. 2, 3 and 4) "interposed between spring seats formed in the projecting portion 39 of the casing and supporting plates-60, 62 which are attached to lugs 64 struck out from the front wall of the supporting plate 28 (Fig. 3), and by a pair of horizontally extending springs 66.68 (Fig. 1) interspaced be tween inclined flanges 10, 12 extending outwardly from the front wall'of the supporting plate 20 and inclined springseats formed in the adjacent sidesof 'the' projecting portion 39 of the casing I (Fig. 1).

' on to the recess 83 for the reception of the tool shaft 34. To facilitate theassembly of the actuating mechanism in the casing, the projecting portion 39 of the casing is made in two sections (Figs. 2 and 3),, an upper section 17 and a lower section 18 which are fastened together by bolts 88. When assembling the actuating mechanism in the casing, the head section 1'6 and the upper section 11 of the base 14 are removed and the actuating mechanism inserted in the lower section 18 of the base, with the tool shaft seated in that portion of the aperture formed in the lower section, after which the upper section TI is bolted to the lower section 18 and the head section 16 is fastened to the assembled base. A

vSurrounding the crank 26 (Fig. 1) and spaced therefrom by ball bearings 8|, is a sleeve 82 having oppositely extending trunnions 86, 88 (Fig. 4)

which'are rotatably mounted in a hub 88 on the tool shaft 34. The hub 90 (Fig. 4) comprises a lower arm having an opening therein which receives the lower trunnion 88 and an upper arm '84 (Figs; 1 and 4) which is bolted to a yoke 9| fitted around the upper trunnion 86.

As illustrated in Fig. 1 and shown in the schematic representation of Fig. 6 in which the angular relation between the crank members 26, 28 and the shaft 24 is exaggerated somewhat for the purpose of clarity, the axis 92 of the driving shaft 24 intersects the axis of the tool shaft 34 (Fig. 1) andthe axis 94 of the crank 26 which extends at an angle to the axis 92 of the driving shaft intersects the latter at its point of intersection with the axis ofthe tool shaft, thus rotation of the driving shaft will cause the crank to gyrate about the point of intersection of the three axes as a center in such a manner as to generate :a double cone the vertex of which is at said point. In this manner the sleeve 82 is caused to gyrate in consonance with the crank and is given a characteristic movement which may be resolved into two components, the first component being movement in a horizontal plane parallel to the axis-ofthe tool shaft, which serves merely to rotate thesle'eve 82 back and'forth in the hub 90, the second component being movement in a verticalplane perpendicularto .the axis of the tool shaft, which iseffective to" oscillate the tool-carrying shaft. through. the agencyof the hub 90. The mechanism fortranslating gyratory motion of the crank. into oscillatoryzmotlon of the tool shaft is duplicated betweentheoppm,

site crank 28 andits associated tool shaft 36.

Rotation of the drive shaft 2.4.:will cause the tool shafts 34, 36 to movesimultaneously in the 1 same direction due to the parallel arrangements of the cranks 26, 28, and the resistance by the tool shafts to this motion, willv cause reverse stresses to be set upin the'shaft 24due to the fact that the reactions from the tool shafts occur 1 at opposite sides of this shaft. These reactions from the tool shaftwill cause a slight amount of bending in the cranks due tothe elasticity of materials out of whichthey are made. However, as the cranks are on opposite sides of the shaft 24 and are parallel to each other, theunbalancing the cranks tend to bend it in an S-shape, or into the shape of a flat sine curve. This will result in such a symmetrical deformation of the shaft aboutits axis of rotation as will, not seriously disturb the center of gravity of the rotating shaft. The shaft 24 and the cranks, 26, 28 are in a. state of static balance, but, due to the use of the spaced bearings 8! (Fig. 1) which apply loads to these cranks at unequal distances from the pulley 33, the cranks are not in a condition of dynamic balance. To restore a condition of dynamic balance counterweights I34-are, attached to the ends of these cranks. i k

Extending outwardly from the tool shaft hub 83 (Fig. 4) is a tool shaft 34.7which is recessed near its inner end to receive a bearing 94 for a.

rotatable connecting pin 96. Theconnecting pin 96 is provided with an enlarged head 98 at its inner end which normally engages the bearing 94 and limits the outward movement of the pin. The head 98 is provided with a recess I!!!) which is arranged to engage a lug I92 (Figs. 1 and 4) on the adjacent face of the crank sleeve 82 under certain conditions which will behereinafter de-.

scribed. Slidably and rotatably received within the tool shaft 34 is a hollow shank or spindle It! extending laterally from a tool carrying head I (it which is provided with interchangeable edge setting tools "36a and H161) (Fig. 3) either of which may be brought into operative position by giving the tool head and spindle a half rotation withyresp'ect tothe tool shaft 34. The Wall of the shank IMis located between the wall of the tool shaft 34 and the connecting pin 96 and at I itsinner end is provided with an inturned flange I88 whichforms an opening through which the t pin 95 extends. The toolhead shank is retained within the tool shaft by a cap I II] attached to the outer end of the connecting pin 96, the cap compressing a spring I22 between its lower face and the inturned flange Ill8,thus resiliently urging 1 the tool head into seating. engagement with the diameter of the bore being slightly greater than the length of the elongated head I24 onthepin 9B. .The bore is connectedwith the other end.

against rotation.

I04 within the tool shaft.

I24, but whichis not as Wide as the lengthwise dimension of thehead. The end faces of the slot II4 are provided with recesses II 8. for locking engagement with the under surface of the head, I24. Threaded vinto the opening in the shank I04 is a plug 92 which seals this opening I and thus prevents the escape of oil which would otherwise work its way out throughthis passage from the interior of the casing. The tool head is assembled in the following manner. Theshank portion IIM is first inserted'into the opening in the tool shaft 34, the opening formed by the flange I08 fitting over and sliding along, the pin 96.- After the shank has been fully inserted in the tool, shaft the spring I22 is then slid over the pin 96,.and the cap H is first pressed inwardly, by a tool, not shown,. compressing the spring I22 and moving the pin 96 inwardly Lmtil the recess I00 in the head 98 engages the lug I92 on the crank sleeve, thus holding the pin 96 The cap is then rotated through an angle of 90 and is allowed to move outwardly under the urging of the spring I22, which movement will cause the pin head I2 3 to seat in recesses H6 in the cap, thus locking the cap in engagementwith the head of the connecting pin and. maintaining the spring I22 under compression to retain thereby the tool head shank When pressure is removed from the cap III] the spring 522 will move the cap and pin 96 outwardly causing the head 98 to move out of engagement with the lug I02 and into engagement .With the bearing 94.

The construction of the tool head Hi and the shifting mechanism for rotating this tool head form no part of this invention, that mechanism forming part of, the subject-matter of the ap plication for United.States Letters Patent Serial 1 No. 175,293, filed November 18, 1937, in the name of William. Hamann In order that the connections between the tool shaft and the crank may be properly lubricated,

the casing head 16 is provided with a central openings formed therein for the reception of the drive shaft 24and pulley 30,1 baffles I32 are'provided which depend from the cover plates (best shown in Figs. 1 and 2) and substantially close these openings. A gasket I36 (Figs. 1 and 4) fills the space between the projecting portion 39 and the plate 20 for a similar purpose.

Having thus describeclmy invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. An edge-setting machine having, in combination, an oscillatable tool shaft, operating mechanism for the tool shaft, a support, and yieldable means for mounting said shaft and operating mechanism 1 on the support whereby the amplitude of the vibration transmitted to the support and the noise .causedby vibration is minimized.

. 2, A. machine for. operating .uponshoes having, in combinatiom'a casing, a="'t'o"ol='shaft' and operating mechanism therefor disposed within said casing, a support, andres'i1ient-means interposed between'the support" and the casing for sustaining the casing, the casing and resilient means absorbing vibration'set up by the tool shaft and its operatingmechanism thereby re-' ducingthe amplitude of the vibration transmitted to the support.

3. An edge-setting machine adapted to operate at high speed having, in combination, an oscillatable tool shaft, a crank arranged to oscillate said tool sh'aftja relatively heavy casing surrounding said crank and tool shaft, 'a base, and resilient means supporting :the casing on the base, the inertia of the casing and theyielding of the resilient means acting to dampen out vibration .set up by .thecrank and thusjreduce the amplitude of the vibration transmittedto the base thereby enabling the machine to run quietly and smoothly at high speed.

f. A machine for 'operating'upon shoes having, in combination, a support, ,a tool shaft, operating mechanism for the tool shaft, said shaft and operating mechanism being positioned within "the support, and yieldablef means for holding the shaft and operating mechanism inspaced relation to the supportwhereby the shaft and operating mechanism may be moved relatively to the support when the shoes arebeing operated upon and the amplitude of the vibrations transmitted to the support will be reduced;

5. A machine for operating upon shoes having,

in combination, a support, a casing constructed and arranged to receive atoolshaft'and mechanism for operating the shaft, a tool shaft and operatingmechanism therefor mounted in said casing, said casing being positioned within the support, and resilient means for sustaining the casing in spaced relation to'the support whereby the casing, tool shaft and operating mechanism may be moved relatively to the support'in response to pressure from the shoe being operated upon. p

6. A finishing machine having, in combination, spaced tool shafts arranged to receive finishing tools, operating mechanism for said shafts, a support, and resilient supporting means for holding the shafts and operating mechanism in spaced relation to the support whereby they may be moved relatively to the support under pressure from the work and thus facilitate the operation of the finishing tools upon the-work.

'7. A finishing machine havingpin combina tion, spaced tool shafts arranged to have finishing tools mounted thereon, driving means connected to-and supported by said tool shafts, casings supporting said? tool .shafts and forming bearings for the same, a support, and yieldable means for holding said casings in spaced relation to said support whereby the shafts may be moved relatively to one another and to the support thus facilitating the operation of the finishing. tools upon the work and reducing the amplitude of the vibrations transmitted to the support.

8.'A finishing machine having, in combination, spaced tool shafts arranged to-have.finishing tools mounted thereon, "means for operatingv said tool shafts, bearings forsaid shafts, a support, and resilient meansfornmounting each of said bearings on the support and spacing the same from the support thereby permitting said hearings to move independently of one another in response to pressures exerted upon-the shaft.

9. A machine 'for: operating *upon shoes-having, inrircombinatiomi ar..-support, a plurality of tool shafts;means iforvoscillating said tool shafts, said means comprising an: operating member, parallel'cranks operatedby the operating member and-connectionsbetweenthe cranks and the toolishafts, and resilient =means for holding the too1 1shafts.andithe means-for oscillating those shafts-in: spaced relation to the I support. 1'0.'A maehine foroperatingupon shoes having, in combination; spaced parallel tool shafts, and means for oscillating saidtool shafts, said means comprising 'a rotatable member and connections betweenthe member and the tool shafts, the rotatable member including cranks so constructed andl-arranged that the internal strains set up'in the member upon rotation tend to bend it-into a shape resembling a fiat" sine curve.

11. An edge-setting machine adapted to operateat high speeds having, in combination, spaced parallel tool shafts' means for oscillating the shafts, said means comprising a rotatable memher and connections between the member and the shafts which bothsupport the rotatable member and transmit motion from the rotatable member to the shafts, said rotatable member including cranks so constructed and arranged that the forces set up in the member upon rotation 'are substant ially balanced between its supports thereby reducing vibrations and avoiding low critical operating speeds.

12. An edge-settin'gmachine adapted to operate at highspeeds comprising, in combination, spacedparallel tool shafts, means for operating said shafts, 'saidmeans comprising a rotatable shaft having parallel cranks extending from diametrically opposite positions on its ends and connections :between the cranks and the tool shafts which both support the shaft and cranks and transmit motion from the cranks to the tool shafts, the arrangement being such that upon operation of the machine deflection of the cranks tend to 'deform saidshaft symmetrically withrespect to its axis of rotation whereby its center of gravity is maintained substantially constant.

13. An edgesetting machine adapted to operate at high'speed having, in combination, spaced parallel tool shafts,',a rotatable operating shaft located between the tool shafts, a crank extending from each e'nd of the operating shaft, the longitudinal 'axesoflthe cranks being parallel to eachother and extending at an angle to the longitudinal axis of the operating shaft, and connections' between the cranks and the adjacent tool shafts for transmittingmotionfrom the cranks to the tool shafts. p Y

' 14., A shoe finishing machine adapted to operate at high speed having, combination, a housing, arranged toreceive and retain a 111- bricant, a crank and a finishing tool shaft located Within said housing, a vibration absorbing casing surrounding aportion of the crank and ing, incombination, a casing, atool shaft mounted in said casing, ato'ol holder, means for coupling the tool shaft with the tool holder comprising-arotatable member the inner end of which rangedfor engagement with the rotatable member thereby preventing the same from rotating when the cooperating member and the rotatable member are being connected or disconnected.

16. A machine for operating upon shoes having, in combination, a casing, a tool shaft mounted in said casing, justable means for coupling the tool shaft with thetool holder comprising a member slidably and rotatably mounted in said tool shaft, the inner end of the member being located within the casing, said member being arranged to slide inwardly. upon adjustment of the coupling means, and means within thecasing arranged to engage said member upon its inward movement thereby preventing it from rotating while the coupling adjustment is being made.

17. In an edge-setting machine comprising a casing, a tool shaft mounted in said casing, and mechanism for operating the tool shaft located within said casing, the combination of a tool holder, disconnectable means for coupling the tool holder with the tool shaft comprising a member slidably and rotatably mounted on said tool shaft, the innerendof the member being posia tool holder, ad

tioned within the casing, said member being are ranged to slide inwardly upon connection or disconnection of the couplingmeans, and means on said operating mechanism adapted for engagement with the member upon its inward movement therebypreventing it from rotating while i the couplingadjustment is being made.

18. An edge-setting machine adapted to opera ate at high speeds having, in combination, a suppoms tool-carrying shaft adapted to oscillate about a substantially horizontal axis, a drive shaft connected to said tool shaft to oscillate it, a massive casing surrounding the connection between said shafts, one of said shafts being journaled in said casing, and resilient means interposed between the casing and the support.

19. An edge-setting machine adapted to operate at high speeds having, in combination, oppo sitely directed, spaced, parallel tool shafts, means for, supporting said shafts for oscillation about substantially horizontal axes, a drive shaft the axis of which intersects the axis of the tool shafts,

LAURENCE ELMER TOPHAM. 

